What does butterfly valve DN300 PN10 mean

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

DN300 is the specification, and PN10 is the pressure. But there is still a lack of materials, operation methods, connection methods...

DN200 is a specification diameter that represents the diameter of the pipe, for example, the nominal diameter of 200 is DN200.

PN160: is the pressure, 1MPa = 10 kg pressure. Kg. pn160=16mpa

According to your number, it is: Z41W H-160P DN200 specific meaning: Z: Gate valve 4: Flange connection. 1 stands for single ram W stands for sealing material, let's talk about this first.

dn refers to the nominal diameter (outer diameter) of the valve, from 200 to 200mm outer diameter;

PN refers to the operating pressure of the valve, and 160 refers to 160MPa.

In general, the corresponding valve that best matches the process parameters of the pipeline is used.

DN200 refers to the nominal diameter of the valve, the unit is mm, and PN160 refers to the tolerance pressure of the valve, the unit is 1 10MPa.

Send me an email and send you a specific one.

DN400 is the inner diameter of the butterfly valve.

10 pressure, write pn10, that is.

The P body is made of 304 material.

If it's C, it's a WCB material.

The DN100 gate valve body is 10 cm, and the valve body includes: the middle valve body, the cylindrical box and the flange. The flanges are respectively arranged on the two opposite end faces of the cylindrical box.

The gate valve is a gate plate with opening and closing parts, the direction of movement of the gate plate is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and closed, and cannot be adjusted and throttled.

1. PN refers to the nominal pressure of the valve, followed by an integer number. In our country, when it comes to nominal pressure, for the sake of clarity, the unit of measurement is usually given, which is expressed as "mpa". For example, PN100 means that the nominal pressure is 10MPa, which is 100kgf cm2.

2. DN refers to the nominal diameter of the valve, generally a number will be added after it, such as the nominal diameter of 250mm, which should be marked as DN250.

This number is directly related to the feature size such as the aperture or outer diameter (in mm) of the end connector. Under normal circumstances, the channel diameter of the valve is the same as the nominal size, but when the valve body adopts a pipe welded structure or the pipe connected to it is connected with a standard steel pipe flange, the actual channel diameter of the valve is not equal to the value of the nominal size DN.

3. The unit of nominal diameter of the national standard AETV valve is mm, and the unit of nominal diameter of the American standard AETV valve is in (inches).

The conversion is as follows: 1 point = 1 8 inches = DN6

2 points = 1 4 inches = DN8

3 points = 3 8 inches = DN10

4 points = 1 2 inches = DN15

6 points = 3 4 inches = DN20

8 points = 1 inch = DN25

Summary. DN20 means that the valve diameter is 20mm

What does DN20-100 mean on the valve?

DN20 means that the valve diameter is 20mm

DN100 refers to the inner diameter of the butterfly valve.

d stands for. It is the butterfly valve 3 that represents the turbine drive.

4 represents the flange connection.

1 stands for straight-through.

X stands for butadiene rubber seal.

10 represents the pressure in kilograms).

Butterfly valve (English: butterfly valve) refers to a kind of valve with a shut-off part (disc or butterfly plate) as a disc, rotating around the valve shaft to achieve opening and closing, which is mainly used for cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting.

The butterfly valve is usually less than 90° when fully open to fully closed, and the butterfly valve and the butterfly rod itself do not have the ability to self-lock, so in order to position the butterfly plate, a worm gear reducer should be installed on the valve stem. The use of worm gear reducer can not only make the butterfly plate have the ability to lock itself, make the butterfly plate stop in any position, but also improve the operation performance of the valve.

The characteristics of the industrial butterfly valve can withstand high temperatures, the applicable pressure range is also high, the valve nominal diameter is large, the valve body is made of carbon steel, and the sealing ring of the valve plate is made of metal ring instead of rubber ring. The large high-temperature butterfly valve is made of steel plate welding, which is mainly used for flue air ducts and gas pipelines of high-temperature medium.

The relationship between the opening of a butterfly valve and the flow rate is basically linear and proportional. If it is used to control the flow rate, its flow characteristics are also closely related to the flow resistance of the piping, such as the diameter and form of the valves installed in the two pipelines are the same, and the pipeline loss coefficient is different, the flow rate of the valve will be very different.

If the valve is in a state of large throttling, the back of the valve plate is prone to cavitation, and there is a possibility of damaging the valve, so it is generally used outside 15°.

When the butterfly valve is in the middle opening, the opening shape formed by the valve body and the front end of the butterfly plate is centered on the valve shaft, and the two sides form different states, the front end of the butterfly plate on one side moves along the direction of flowing water, and the other side moves against the direction of flowing water, therefore, the valve body on one side and the valve plate form a nozzle-shaped opening, and the other side is similar to the throttle hole-shaped opening, the nozzle side is much faster than the flow rate on the throttle side, and negative pressure will be generated under the valve on the throttle side, and the rubber seal will often fall off.

The operating torque of the butterfly valve, due to the different opening and opening and closing direction of the valve, its value is different, and the horizontal butterfly valve, especially the large-diameter valve, due to the water depth, the torque generated by the difference between the upper and lower head of the valve shaft can not be ignored. In addition, when an elbow is installed on the inlet side of the valve, a deflection flow is formed, and the torque increases. When the valve is in the middle opening, the operating mechanism needs to be self-locking due to the action of the water flow torque.

The DN of the valve door: indicates the nominal diameter of the valve, which is the size of the valve diameter; The pn of the valve door indicates the nominal pressure of the valve, which is the pressure range of the valve.

PN full name (pressure nominal): stands for nominal pressure, the unit is MPA megapascals, and the reference value related to the pressure resistance of piping system components, for ease of use, usually take the priority number of R10 series. Nominal pressure refers to the working pressure of water conveying when the pipe is 20.

If the water temperature is between 25 and 45, the working pressure should be corrected according to different temperature drop coefficients. For example, the nominal pressure of J41H-16C is 16kgf cm2, that is, the pressure value per square centimeter is 16kg, if it is calculated in megapascals.

dn: The unit of internal diameter of the pipeline is mm mm, and the nominal diameter is also known as the nominal diameter. It is neither the outer diameter nor the inner diameter, which is stipulated by people in order to achieve standardization, so that pipes and fittings of the same diameter can be connected to each other, and have interoperability and interchangeability.

For example, DN50 is 50 mm, and the fractional valve is the internal diameter of the pipe in inches, 1 inch = centimeter.

DN is the nominal diameter, which is the caliber. For example, you can see DN25, which means that the diameter (diameter) is 25mm, which is 1 inch.

PN is the nominal pressure, that is, the pressure level of the valve inlet and outlet. For example, the PN16 nominal pressure is about 150 pounds, 2MPa.

dn is the nominal diameter, that is, the caliber; pn is the nominal pressure.